According to [1]}, [2]}, [3]}, supermodular game \(\mathcal {G}_{M_i}, i\in \mathcal {M} \)  (\(\mathcal {G}_{U_k}, k\in \mathcal {N} \) ) indicates that the marginal payoff of any miner \(i\)  (user \(k\) ) can be increased if all players in the in-circle game behave in unity. That is to say, when other miners select late starting up strategies, it becomes more profitable for miner \(i\)  to power on its rigs lately and vice versa; similarly, if other users bid low transaction fees, offering a low transaction fee as well will benefit user \(k\)  and vice versa. Such a complementary strategy occurs in homogenous players is termed as strategic complementarity [3]} and we can use another metaphor, i.e., theatre effect, to illustrate it more intuitively: when most of the audience stand up to watch a movie, the best response of the other is to stand up as well, keeping the same pace with others.
